[INFO] updating cached repository https://github.com/Nasafato/parser-combinators
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fad190618ec9ee7ead185c85d02113e62f845065
[INFO] testing Nasafato/parser-combinators against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNasafato%2Fparser-combinators" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nasafato/parser-combinators on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Nasafato/parser-combinators
[INFO] finished tweaking git repo https://github.com/Nasafato/parser-combinators
[INFO] tweaked toml for git repo https://github.com/Nasafato/parser-combinators written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Nasafato/parser-combinators already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 423c43a65bc09a1d2edc780c3b05b23310fa3b8ba7540c5fa7b7b6507d2a4a6d
[INFO] running `"docker" "start" "-a" "423c43a65bc09a1d2edc780c3b05b23310fa3b8ba7540c5fa7b7b6507d2a4a6d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling parser_combinators v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/lib.rs:251:10
[INFO] [stderr]     |
[INFO] [stderr] 251 |       if (predicate(&value)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `match_literal`
[INFO] [stderr]   --> src/lib.rs:15:4
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn match_literal<'a>(expected: &'static str) -> impl Parser<'a, ()> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `identifier`
[INFO] [stderr]   --> src/lib.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn identifier(input: &str) -> ParseResult<String> {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `map`
[INFO] [stderr]   --> src/lib.rs:91:4
[INFO] [stderr]    |
[INFO] [stderr] 91 | fn map<'a, P, F, A, B>(parser: P, map_fn: F) -> impl Parser<'a, B>
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pair`
[INFO] [stderr]    --> src/lib.rs:103:4
[INFO] [stderr]     |
[INFO] [stderr] 103 | fn pair<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, (R1, R2)>
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `left`
[INFO] [stderr]    --> src/lib.rs:117:4
[INFO] [stderr]     |
[INFO] [stderr] 117 | fn left<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, R1>
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `right`
[INFO] [stderr]    --> src/lib.rs:125:4
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn right<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, R2>
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `one_or_more`
[INFO] [stderr]    --> src/lib.rs:182:4
[INFO] [stderr]     |
[INFO] [stderr] 182 | fn one_or_more<'a, P, A>(parser: P) -> impl Parser<'a, Vec<A>>
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `zero_or_more`
[INFO] [stderr]    --> src/lib.rs:205:4
[INFO] [stderr]     |
[INFO] [stderr] 205 | fn zero_or_more<'a, P, A>(parser: P) -> impl Parser<'a, Vec<A>>
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `any_char`
[INFO] [stderr]    --> src/lib.rs:237:4
[INFO] [stderr]     |
[INFO] [stderr] 237 | fn any_char(input: &str) -> ParseResult<char> {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pred`
[INFO] [stderr]    --> src/lib.rs:244:4
[INFO] [stderr]     |
[INFO] [stderr] 244 | fn pred<'a, P, A, F>(parser: P, predicate: F) -> impl Parser<'a, A>
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `whitespace_char`
[INFO] [stderr]    --> src/lib.rs:266:4
[INFO] [stderr]     |
[INFO] [stderr] 266 | fn whitespace_char<'a>() -> impl Parser<'a, char> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space1`
[INFO] [stderr]    --> src/lib.rs:270:4
[INFO] [stderr]     |
[INFO] [stderr] 270 | fn space1<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space0`
[INFO] [stderr]    --> src/lib.rs:274:4
[INFO] [stderr]     |
[INFO] [stderr] 274 | fn space0<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quoted_string`
[INFO] [stderr]    --> src/lib.rs:278:4
[INFO] [stderr]     |
[INFO] [stderr] 278 | fn quoted_string<'a>() -> impl Parser<'a, String> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `attribute_pair`
[INFO] [stderr]    --> src/lib.rs:297:4
[INFO] [stderr]     |
[INFO] [stderr] 297 | fn attribute_pair<'a>() -> impl Parser<'a, (String, String)> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `attributes`
[INFO] [stderr]    --> src/lib.rs:301:4
[INFO] [stderr]     |
[INFO] [stderr] 301 | fn attributes<'a>() -> impl Parser<'a, Vec<(String, String)>> {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element_start`
[INFO] [stderr]    --> src/lib.rs:319:4
[INFO] [stderr]     |
[INFO] [stderr] 319 | fn element_start<'a>() -> impl Parser<'a, (String, Vec<(String, String)>)> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `single_element`
[INFO] [stderr]    --> src/lib.rs:323:4
[INFO] [stderr]     |
[INFO] [stderr] 323 | fn single_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/lib.rs:351:6
[INFO] [stderr]     |
[INFO] [stderr] 351 |   fn new<P>(parser: P) -> Self
[INFO] [stderr]     |      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `open_element`
[INFO] [stderr]    --> src/lib.rs:367:4
[INFO] [stderr]     |
[INFO] [stderr] 367 | fn open_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `either`
[INFO] [stderr]    --> src/lib.rs:375:4
[INFO] [stderr]     |
[INFO] [stderr] 375 | fn either<'a, P1, P2, A>(parser1: P1, parser2: P2) -> impl Parser<'a, A>
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element`
[INFO] [stderr]    --> src/lib.rs:386:4
[INFO] [stderr]     |
[INFO] [stderr] 386 | fn element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `close_element`
[INFO] [stderr]    --> src/lib.rs:390:4
[INFO] [stderr]     |
[INFO] [stderr] 390 | fn close_element<'a>(expected_name: String) -> impl Parser<'a, String> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parent_element`
[INFO] [stderr]    --> src/lib.rs:395:4
[INFO] [stderr]     |
[INFO] [stderr] 395 | fn parent_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `and_then`
[INFO] [stderr]    --> src/lib.rs:405:4
[INFO] [stderr]     |
[INFO] [stderr] 405 | fn and_then<'a, P, F, A, B, NextP>(parser: P, f: F) -> impl Parser<'a, B>
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 26 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]  --> src/main.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |         Ok((input, output)) => println!("{} => ", input,),
[INFO] [stderr]   |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `"docker" "inspect" "423c43a65bc09a1d2edc780c3b05b23310fa3b8ba7540c5fa7b7b6507d2a4a6d"`
[INFO] running `"docker" "rm" "-f" "423c43a65bc09a1d2edc780c3b05b23310fa3b8ba7540c5fa7b7b6507d2a4a6d"`
[INFO] [stdout] 423c43a65bc09a1d2edc780c3b05b23310fa3b8ba7540c5fa7b7b6507d2a4a6d
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 297239d3154da485f9c228df0fccf79bd5bf4690d671205bd8926323d861aa91
[INFO] running `"docker" "start" "-a" "297239d3154da485f9c228df0fccf79bd5bf4690d671205bd8926323d861aa91"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling parser_combinators v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/lib.rs:251:10
[INFO] [stderr]     |
[INFO] [stderr] 251 |       if (predicate(&value)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `match_literal`
[INFO] [stderr]   --> src/lib.rs:15:4
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn match_literal<'a>(expected: &'static str) -> impl Parser<'a, ()> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `identifier`
[INFO] [stderr]   --> src/lib.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn identifier(input: &str) -> ParseResult<String> {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `map`
[INFO] [stderr]   --> src/lib.rs:91:4
[INFO] [stderr]    |
[INFO] [stderr] 91 | fn map<'a, P, F, A, B>(parser: P, map_fn: F) -> impl Parser<'a, B>
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pair`
[INFO] [stderr]    --> src/lib.rs:103:4
[INFO] [stderr]     |
[INFO] [stderr] 103 | fn pair<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, (R1, R2)>
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `left`
[INFO] [stderr]    --> src/lib.rs:117:4
[INFO] [stderr]     |
[INFO] [stderr] 117 | fn left<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, R1>
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `right`
[INFO] [stderr]    --> src/lib.rs:125:4
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn right<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, R2>
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `one_or_more`
[INFO] [stderr]    --> src/lib.rs:182:4
[INFO] [stderr]     |
[INFO] [stderr] 182 | fn one_or_more<'a, P, A>(parser: P) -> impl Parser<'a, Vec<A>>
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `zero_or_more`
[INFO] [stderr]    --> src/lib.rs:205:4
[INFO] [stderr]     |
[INFO] [stderr] 205 | fn zero_or_more<'a, P, A>(parser: P) -> impl Parser<'a, Vec<A>>
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `any_char`
[INFO] [stderr]    --> src/lib.rs:237:4
[INFO] [stderr]     |
[INFO] [stderr] 237 | fn any_char(input: &str) -> ParseResult<char> {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pred`
[INFO] [stderr]    --> src/lib.rs:244:4
[INFO] [stderr]     |
[INFO] [stderr] 244 | fn pred<'a, P, A, F>(parser: P, predicate: F) -> impl Parser<'a, A>
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `whitespace_char`
[INFO] [stderr]    --> src/lib.rs:266:4
[INFO] [stderr]     |
[INFO] [stderr] 266 | fn whitespace_char<'a>() -> impl Parser<'a, char> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space1`
[INFO] [stderr]    --> src/lib.rs:270:4
[INFO] [stderr]     |
[INFO] [stderr] 270 | fn space1<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space0`
[INFO] [stderr]    --> src/lib.rs:274:4
[INFO] [stderr]     |
[INFO] [stderr] 274 | fn space0<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quoted_string`
[INFO] [stderr]    --> src/lib.rs:278:4
[INFO] [stderr]     |
[INFO] [stderr] 278 | fn quoted_string<'a>() -> impl Parser<'a, String> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `attribute_pair`
[INFO] [stderr]    --> src/lib.rs:297:4
[INFO] [stderr]     |
[INFO] [stderr] 297 | fn attribute_pair<'a>() -> impl Parser<'a, (String, String)> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `attributes`
[INFO] [stderr]    --> src/lib.rs:301:4
[INFO] [stderr]     |
[INFO] [stderr] 301 | fn attributes<'a>() -> impl Parser<'a, Vec<(String, String)>> {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element_start`
[INFO] [stderr]    --> src/lib.rs:319:4
[INFO] [stderr]     |
[INFO] [stderr] 319 | fn element_start<'a>() -> impl Parser<'a, (String, Vec<(String, String)>)> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `single_element`
[INFO] [stderr]    --> src/lib.rs:323:4
[INFO] [stderr]     |
[INFO] [stderr] 323 | fn single_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/lib.rs:351:6
[INFO] [stderr]     |
[INFO] [stderr] 351 |   fn new<P>(parser: P) -> Self
[INFO] [stderr]     |      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `open_element`
[INFO] [stderr]    --> src/lib.rs:367:4
[INFO] [stderr]     |
[INFO] [stderr] 367 | fn open_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `either`
[INFO] [stderr]    --> src/lib.rs:375:4
[INFO] [stderr]     |
[INFO] [stderr] 375 | fn either<'a, P1, P2, A>(parser1: P1, parser2: P2) -> impl Parser<'a, A>
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element`
[INFO] [stderr]    --> src/lib.rs:386:4
[INFO] [stderr]     |
[INFO] [stderr] 386 | fn element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `close_element`
[INFO] [stderr]    --> src/lib.rs:390:4
[INFO] [stderr]     |
[INFO] [stderr] 390 | fn close_element<'a>(expected_name: String) -> impl Parser<'a, String> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parent_element`
[INFO] [stderr]    --> src/lib.rs:395:4
[INFO] [stderr]     |
[INFO] [stderr] 395 | fn parent_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `and_then`
[INFO] [stderr]    --> src/lib.rs:405:4
[INFO] [stderr]     |
[INFO] [stderr] 405 | fn and_then<'a, P, F, A, B, NextP>(parser: P, f: F) -> impl Parser<'a, B>
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 26 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/lib.rs:251:10
[INFO] [stderr]     |
[INFO] [stderr] 251 |       if (predicate(&value)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]  --> src/main.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |         Ok((input, output)) => println!("{} => ", input,),
[INFO] [stderr]   |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space0`
[INFO] [stderr]    --> src/lib.rs:274:4
[INFO] [stderr]     |
[INFO] [stderr] 274 | fn space0<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `open_element`
[INFO] [stderr]    --> src/lib.rs:367:4
[INFO] [stderr]     |
[INFO] [stderr] 367 | fn open_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `either`
[INFO] [stderr]    --> src/lib.rs:375:4
[INFO] [stderr]     |
[INFO] [stderr] 375 | fn either<'a, P1, P2, A>(parser1: P1, parser2: P2) -> impl Parser<'a, A>
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element`
[INFO] [stderr]    --> src/lib.rs:386:4
[INFO] [stderr]     |
[INFO] [stderr] 386 | fn element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `close_element`
[INFO] [stderr]    --> src/lib.rs:390:4
[INFO] [stderr]     |
[INFO] [stderr] 390 | fn close_element<'a>(expected_name: String) -> impl Parser<'a, String> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parent_element`
[INFO] [stderr]    --> src/lib.rs:395:4
[INFO] [stderr]     |
[INFO] [stderr] 395 | fn parent_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `and_then`
[INFO] [stderr]    --> src/lib.rs:405:4
[INFO] [stderr]     |
[INFO] [stderr] 405 | fn and_then<'a, P, F, A, B, NextP>(parser: P, f: F) -> impl Parser<'a, B>
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.41s
[INFO] running `"docker" "inspect" "297239d3154da485f9c228df0fccf79bd5bf4690d671205bd8926323d861aa91"`
[INFO] running `"docker" "rm" "-f" "297239d3154da485f9c228df0fccf79bd5bf4690d671205bd8926323d861aa91"`
[INFO] [stdout] 297239d3154da485f9c228df0fccf79bd5bf4690d671205bd8926323d861aa91
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 11a51c4edd9906c4edaa78e1230c50e9a332191252a05e332e6c8898bbd6cf8c
[INFO] running `"docker" "start" "-a" "11a51c4edd9906c4edaa78e1230c50e9a332191252a05e332e6c8898bbd6cf8c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/lib.rs:251:10
[INFO] [stderr]     |
[INFO] [stderr] 251 |       if (predicate(&value)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space0`
[INFO] [stderr]    --> src/lib.rs:274:4
[INFO] [stderr]     |
[INFO] [stderr] 274 | fn space0<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `open_element`
[INFO] [stderr]    --> src/lib.rs:367:4
[INFO] [stderr]     |
[INFO] [stderr] 367 | fn open_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `either`
[INFO] [stderr]    --> src/lib.rs:375:4
[INFO] [stderr]     |
[INFO] [stderr] 375 | fn either<'a, P1, P2, A>(parser1: P1, parser2: P2) -> impl Parser<'a, A>
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element`
[INFO] [stderr]    --> src/lib.rs:386:4
[INFO] [stderr]     |
[INFO] [stderr] 386 | fn element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `close_element`
[INFO] [stderr]    --> src/lib.rs:390:4
[INFO] [stderr]     |
[INFO] [stderr] 390 | fn close_element<'a>(expected_name: String) -> impl Parser<'a, String> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parent_element`
[INFO] [stderr]    --> src/lib.rs:395:4
[INFO] [stderr]     |
[INFO] [stderr] 395 | fn parent_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `and_then`
[INFO] [stderr]    --> src/lib.rs:405:4
[INFO] [stderr]     |
[INFO] [stderr] 405 | fn and_then<'a, P, F, A, B, NextP>(parser: P, f: F) -> impl Parser<'a, B>
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/lib.rs:251:10
[INFO] [stderr]     |
[INFO] [stderr] 251 |       if (predicate(&value)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `match_literal`
[INFO] [stderr]   --> src/lib.rs:15:4
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn match_literal<'a>(expected: &'static str) -> impl Parser<'a, ()> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `identifier`
[INFO] [stderr]   --> src/lib.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn identifier(input: &str) -> ParseResult<String> {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `map`
[INFO] [stderr]   --> src/lib.rs:91:4
[INFO] [stderr]    |
[INFO] [stderr] 91 | fn map<'a, P, F, A, B>(parser: P, map_fn: F) -> impl Parser<'a, B>
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pair`
[INFO] [stderr]    --> src/lib.rs:103:4
[INFO] [stderr]     |
[INFO] [stderr] 103 | fn pair<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, (R1, R2)>
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `left`
[INFO] [stderr]    --> src/lib.rs:117:4
[INFO] [stderr]     |
[INFO] [stderr] 117 | fn left<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, R1>
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `right`
[INFO] [stderr]    --> src/lib.rs:125:4
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn right<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, R2>
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `one_or_more`
[INFO] [stderr]    --> src/lib.rs:182:4
[INFO] [stderr]     |
[INFO] [stderr] 182 | fn one_or_more<'a, P, A>(parser: P) -> impl Parser<'a, Vec<A>>
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `zero_or_more`
[INFO] [stderr]    --> src/lib.rs:205:4
[INFO] [stderr]     |
[INFO] [stderr] 205 | fn zero_or_more<'a, P, A>(parser: P) -> impl Parser<'a, Vec<A>>
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `any_char`
[INFO] [stderr]    --> src/lib.rs:237:4
[INFO] [stderr]     |
[INFO] [stderr] 237 | fn any_char(input: &str) -> ParseResult<char> {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pred`
[INFO] [stderr]    --> src/lib.rs:244:4
[INFO] [stderr]     |
[INFO] [stderr] 244 | fn pred<'a, P, A, F>(parser: P, predicate: F) -> impl Parser<'a, A>
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `whitespace_char`
[INFO] [stderr]    --> src/lib.rs:266:4
[INFO] [stderr]     |
[INFO] [stderr] 266 | fn whitespace_char<'a>() -> impl Parser<'a, char> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space1`
[INFO] [stderr]    --> src/lib.rs:270:4
[INFO] [stderr]     |
[INFO] [stderr] 270 | fn space1<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space0`
[INFO] [stderr]    --> src/lib.rs:274:4
[INFO] [stderr]     |
[INFO] [stderr] 274 | fn space0<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quoted_string`
[INFO] [stderr]    --> src/lib.rs:278:4
[INFO] [stderr]     |
[INFO] [stderr] 278 | fn quoted_string<'a>() -> impl Parser<'a, String> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `attribute_pair`
[INFO] [stderr]    --> src/lib.rs:297:4
[INFO] [stderr]     |
[INFO] [stderr] 297 | fn attribute_pair<'a>() -> impl Parser<'a, (String, String)> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `attributes`
[INFO] [stderr]    --> src/lib.rs:301:4
[INFO] [stderr]     |
[INFO] [stderr] 301 | fn attributes<'a>() -> impl Parser<'a, Vec<(String, String)>> {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element_start`
[INFO] [stderr]    --> src/lib.rs:319:4
[INFO] [stderr]     |
[INFO] [stderr] 319 | fn element_start<'a>() -> impl Parser<'a, (String, Vec<(String, String)>)> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `single_element`
[INFO] [stderr]    --> src/lib.rs:323:4
[INFO] [stderr]     |
[INFO] [stderr] 323 | fn single_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/lib.rs:351:6
[INFO] [stderr]     |
[INFO] [stderr] 351 |   fn new<P>(parser: P) -> Self
[INFO] [stderr]     |      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `open_element`
[INFO] [stderr]    --> src/lib.rs:367:4
[INFO] [stderr]     |
[INFO] [stderr] 367 | fn open_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `either`
[INFO] [stderr]    --> src/lib.rs:375:4
[INFO] [stderr]     |
[INFO] [stderr] 375 | fn either<'a, P1, P2, A>(parser1: P1, parser2: P2) -> impl Parser<'a, A>
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element`
[INFO] [stderr]    --> src/lib.rs:386:4
[INFO] [stderr]     |
[INFO] [stderr] 386 | fn element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `close_element`
[INFO] [stderr]    --> src/lib.rs:390:4
[INFO] [stderr]     |
[INFO] [stderr] 390 | fn close_element<'a>(expected_name: String) -> impl Parser<'a, String> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parent_element`
[INFO] [stderr]    --> src/lib.rs:395:4
[INFO] [stderr]     |
[INFO] [stderr] 395 | fn parent_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `and_then`
[INFO] [stderr]    --> src/lib.rs:405:4
[INFO] [stderr]     |
[INFO] [stderr] 405 | fn and_then<'a, P, F, A, B, NextP>(parser: P, f: F) -> impl Parser<'a, B>
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 26 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]  --> src/main.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |         Ok((input, output)) => println!("{} => ", input,),
[INFO] [stderr]   |                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/parser_combinators-34eecf1a9d93387c
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test attribute_parser ... ok
[INFO] [stdout] test pair_combinator ... ok
[INFO] [stdout] test predicate_combinator ... ok
[INFO] [stdout] test right_combinator ... ok
[INFO] [stdout] test one_or_more_combinator ... ok
[INFO] [stdout] test single_element_parser ... ok
[INFO] [stdout] test zero_or_more_combinator ... ok
[INFO] [stdout] test quoted_string_parser ... ok
[INFO] [stdout] test identifier_parser ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/parser_combinators-d4c974a5022cd1de
[INFO] [stdout] test literal_parser ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests parser_combinators
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:251:10
[INFO] [stderr]     |
[INFO] [stderr] 251 |       if (predicate(&value)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "11a51c4edd9906c4edaa78e1230c50e9a332191252a05e332e6c8898bbd6cf8c"`
[INFO] running `"docker" "rm" "-f" "11a51c4edd9906c4edaa78e1230c50e9a332191252a05e332e6c8898bbd6cf8c"`
[INFO] [stdout] 11a51c4edd9906c4edaa78e1230c50e9a332191252a05e332e6c8898bbd6cf8c